JAVA实现聊天室 多线程

package ChatRoom;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.nio.charset.StandardCharsets;

public class Sender1 implements Runnable {
    DatagramSocket socket = null;
    BufferedReader reader = null;

    private int fromPort;
    private int toPort;
    private  String toIP;

    public Sender1(int fromPort,String toIP,int toPort) {
        this.fromPort=fromPort;
        this.toIP=toIP;
        this.toPort = toPort;

         try{
             socket = new DatagramSocket(fromPort);
             reader = new BufferedReader(new InputStreamReader(System.in));
         }catch (Exception e){
             e.printStackTrace();
         }
    }

    @Override
    public void run() {
        while(true){
            try {
                String data = reader.readLine();
                byte[] datas =data.getBytes();
                DatagramPacket packet = new DatagramPacket(datas,0,datas.length,new InetSocketAddress(this.toIP,this.toPort));

                socket.send(packet);
                if (data.equals("bye")){
                    break;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        socket.close();
    }
}

package ChatRoom;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;

public class Sender2 implements Runnable {

    DatagramSocket socket = null;
    private int port;
    private String msgFrom;

    public Sender2(int port, String msgFrom) {
        this.port = port;
        this.msgFrom = msgFrom;
        try {
            socket = new DatagramSocket(port);
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void run() {

        while (true) {
            try {
                //准备接收包裹
                byte[] container = new byte[512];
                DatagramPacket packet = new DatagramPacket(container, 0, container.length);
                socket.receive(packet);  //阻塞式接收包裹

                //断开连接
                byte[] data = packet.getData();
                String ReceiveDate = new String(data, 0, data.length);
                System.out.println(msgFrom + ":" + ReceiveDate);
                if (ReceiveDate.equals("bye")) {
                    break;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        socket.close();
    }
}

package ChatRoom;

public class Talk1 {
    public static void main(String[] args) {
        //开启两个线程
        new Thread(new Sender1(7777,"localhost",9999)).start();
        new Thread(new Sender2(8888,"顾客甲")).start();
    }
}

package ChatRoom;

public class Talk2 {
    public static void main(String[] args) {
        new Thread(new Sender1(5555,"localhost",8888)).start();
        new Thread(new Sender2(9999,"顾客乙")).start();
    }
}

备注：从狂神说Java视频中学得。